Before diving into the tool, it's crucial to understand what makes a PDF accessible. An accessible PDF is more than just a text document saved as a PDF; it contains an invisible structure that allows assistive technologies, like screen readers, to interpret and present the content correctly to users with visual or cognitive disabilities. This structure ensures that images have meaningful alternative text, documents can be navigated by headings, and the reading order is logical. For many organizations, creating such documents is not just a best practice but a legal requirement, driven by laws like the Americans with Disabilities Act (ADA) and the European Accessibility Act (EAA).
function drawTrend(varargin) % 1. Extract the axes handle if it exists [ax, args, nargs] = axescheck(varargin:); % 2. Enforce the required data inputs if nargs < 2 error('You must provide both X and Y data arrays.'); end x_data = args1; y_data = args2; % 3. Decide where to plot the data if isempty(ax) % If no axes were passed, use the current active workspace ax = gca; end % 4. Safely plot to the targeted axes plot(ax, x_data, y_data, 'LineWidth', 2, 'Color', 'r'); grid(ax, 'on'); end Use code with caution.
File or grind away the deformed, flanged metal edges until the poll is square again. axescheck
Here is a simplified look at how a professional MATLAB function might be structured:
data_dims = data.ndim
: Identifying errors in the "tag tree" that might prevent screen readers from interpreting content correctly. Metadata & Settings
He passed the check, but he had failed himself. Before diving into the tool, it's crucial to
If a user attempts to map data onto a deleted UI element or an invalid graphic type, traditional functions may crash ungracefully. Tracking down these structural anomalies at the entry point of the function shields code from downstream runtime failures. Practical Implementation in a Custom Plot Function
Here is a put-together feature specification and implementation for a robust axescheck utility. For many organizations, creating such documents is not
internally, ensuring that only valid axes handles are processed.
Navigate to Viewport Overlays > Axes. This visual lets you see global vs. local axes of any object. Pro tip: Append a simple cube and check its bounding box orientation.